Synthesis, characterizationandelectrocatalyticpropertiesof delafossite CuGaO2

Journal Article

YuanbingMao, JahangeerAhmed and . 2016

• Publication Work Type: Original Research Paper
• Publication Online URL: Journal of Solid State Chemistry
• Volume Number: 242
• Pages: 77

Publication Abstract

Delafossite CuGaO2 has been employed as photocatalysts for solar cells, but their electrocatalytic properties have not been extensively studied, especially no comparison among samples made by different synthesis routes. Herein, we first reported the successful synthesis of delafossite CuGaO2 particles with three different morphologies, i.e. nanocrystalline hexagons, sub-micron sized plates and micron–sized particles by a modified hydrothermal method at 190°C for 60 h,1,2,3 a sono-chemical method followed by firing at 850°C for 48 h, and a solid state route at 1150°C, respectively. Morphology, composition and phase purity of the synthesized samples was confirmed by powder X-ray diffraction and Raman spectroscopic studies, and then their electrocatalytic performance as active and cost effective electrode materials to the oxygen and hydrogen evolution reactions in 0.5 M KOH electrolyte versus Ag/AgCl was investigated and compared under the same conditions for the first time. The nanocrystalline CuGaO2 hexagons show enhanced electrocatalytic activity than the counterpart sub-micron sized plates and micron-sized particles.